Wet age-related macular degeneration (AMD) happens when abnormal blood vessels leak fluid into the macula. It can cause wavy lines, blurriness, and dark spots, but not peripheral vision loss. The ...

Impaired vision and blindness are not uncommon. About 3.4 million people in the U.S. are visually impaired. Vision is usually measured by visual acuity charts, and normal vision is expressed as 20/20.

The Jaeger chart was designed to test near vision acuity. Eduard Jaeger von Jaxtthal (1818–1884) was an Austrian ophthalmologist and a professor at the University of Vienna who, in the 1850s, made ...